Improved hoisting-apparatus



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WILLIAM DYATTJOF NEW YORK, N. yY.

Letters Patent No. 97,487 dated. December 7, 1869.

IMPRQVED HOISTINGAPPARATUS.

Mre-

'Phe Schedule vreferred to in' these Letters Patent and making part of the same.

Todall whom 'it may concern Be it known that I, WILLIAM DYATT, of the city,

` county, and State of New York, have invented a new and useful Improvement in Hoisting-Apparatus, of which the following is a specification;

'lhe nature of my invention consists in'thearrangement and combination of the gearing employed for eperating the drums, whcreby all accidents will be prevented arising from the necessity of having to turn thedruin tillvthe weight is landed or of losing hold of the handle, and, at the same time, dispense with the use of pawls or b'rakes while a weight is still suspended.

The accompanying drawing represents a side elevation, partly in section, of a hoisting-apparatus embodying myinventiou. Y D represents the frame, to the lower part of which a large drum, F, and a small drum, E, are arranged.

To the ends of the shafts of each of these drums F and E, wheels G and H, of equal diameter, are securely fastened, between which a pinion, I, is arranged, meshing, at the same time, into the'wheel G and into the wheel H. Y

Tothe end of the shaft of the pinion J a handle is attached for the purpose ot" operating the saine.

Near the top of the frame D a double pulley, B, is fixed.

K is the rope attached to the smaller drum E, around which it passes, then over the upper pulley B, under the wheel 'of a, loose pulley, O, provided with the necessary hook, then over the lower wheel of the pulley B and around the larger drum F, to which `the other end of sai'd rope is fastened.

, The drums revolve both in the saine direction, the

-rope being placed so thatit is being gathered on one while-it is being relinquished by the other.

Greater speed lin the raising or lowering of the weight may be obtained by increasing the size of the gearavhecl on the smaller drum, thereby enabling the larger drum to retain its s eed while the speed of' the smaller drum is diminishe( By this arrangement ot the drums and gearing and the manner of combiningthe saine, no ratchet-wheel, pawl, or brake will be required, and the weight may be raised or lowered to any point, where it will be sustained, 'even it thehandle on the pinion-shaft is left loose or free.

'I do not claim the arrangement of two drums of unequal diameters; but

What I claim as iny invention, and desire to secure by Letters Patent, is-

The arrangement of two drums, F and E, in combination with their wheels G and H, worked both simultaneously by a pinion, J, placed between said wheels and one continuous rope or chain passing over double pulley B and pulley C, substantially as and for the purpose hereinbefore set forth.

The above specification signed by me, this 11th day of September, 1869.

lVitnesses:

GEORGE HAYES, A. M. STnNBAoK.

WILLIAM DYATT. 

